The number of cardinals who will vote for the new pope in the 2025 conclave is 133. This is because, out of 135 cardinal electors eligible by age (under 80), two did not attend, leaving 133 cardinals participating in the voting process

. To elect the new pope, a candidate needs a two-thirds plus one majority of the participating cardinal electors. With 133 cardinals voting, this means a candidate must receive at least 89 votes to be elected pope

. In summary:

• Eligible cardinal electors: 135
• Attending cardinal electors: 133
• Votes required to elect pope: 89 (two-thirds plus one of 133)

This conclave is notable for having more than the traditional maximum of 120 cardinal electors, with 133 participating, making it the largest conclave in history by number of electors